const fs = require('fs');

let promise = new Promise((resolve, reject) => {
	fs.readFile('./p1.txt', 'utf8', (err, result) => {
		if (err != null) {
			reject(err);
		} else {
			resolve(result);
		}
	})
});
promise.then((result) => {
	console.log(result);
})
.catch((err) => {
	console.log(err);
})